Improvement in bed-bottoms



W. GRAHAM.

Improvbment inBed-Bottoms.

No 133,093 Patented Now-19,1872.

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WILLIAM GRAHAM, OF SHARPSBURG, PENNSYLVANIA.

IMPROVEMENT IN BED-BOTTOMS.

Specification forming part of Letters Patent No. 133,093, dated November 19, 1872. I

To all whom it may concern:

Be it known that I, \VILLIAM GRAHAM, of Sharpsburg, in the county of Allegheny and State of Pennsylvania, have invented a certain new and useful Improvement in Bed-Bottoms; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompa nying drawing and to the letters of reference marked thereon.

The nature of my invention consists in a bed-bottom so constructed that it can be filled with air and husks, and be elastic and buoyant, thereby serving the double purpose of bed and life-preserver.

To enable others skilled in the art to make and-use my invention, I will proceed to describe its construction and operation.

In the accompanyin g drawing, which forms part of my specification, Figure 1 is a perspective view of my improvement in bed-bottoms, Fig. 2 is a longitudinal section of the same at line y of Fig. 1; and Fig. 3 is atransverse section at line y of Fig. 1. g

In the accompanying drawing, A is the frame of the bed-bottom, and is constructed of wood, care being taken to have the joints of the frame perfectly air-tight and well oiled,

and then varnished with an article of varnish which is impervious to water. 13 represents the canvas of the frame, which is constructed of India rubber or gum-cloth, or other elastic and waterproof material, the texture of which will not allow air to pass through it.

The canvas B is secured to the frame A by nails or screws, care being taken to coat the edges of the frame A with an adhesive cement which is impervious to water and which will dry quickly. In one of the end pieces of the frame A is secured a short tube, 0, and on the inside of this end piece is secured a strip, D, of India rubber, which is nearly equal in length and width to the inside length and width of the end piece. This strip D acts as a valve for closing the inner end of the tube 0 communicating-with the interior of the bed bottom.

Having secured one sheet of the canvas B to the frame, and the end piece, being provided with the elastic valve D, the frame is filled loosely with husks or other material used for filling in bed-bottoms; then the other sheet of canvas is secured to the frame A in the manner above described.

The constructionof the bed-bottom is then completed; but prior to using it it is filled with .air, which is done in the following manner: A suitable apparatus is connected to the tube 0 for forcing air into the bed-bottom, so

as to fill the interstices between the husks or other material used as a filling. As soon as a suflicient pressure of air is forced into the bedbottom the strip D will so press against the inner end of the tube (3 as to perfectly close it and prevent the escape of air from the bedsels will answer the purpose of a life-preserver.

Having thus described my improvement, what I claim as of my invention is p A bed-bottom, consisting of the frame A, canvas B, tube 0, and strip D, combined with a husk-filling and air-tight chamber, all constructed and operating as herein described, and for the purpose set forth.

WILLIAM GRAHAM. Witnesses:

A. 0. JOHNSTON, JAMES J. J OHNSTON. 

